How to paire the button to the receiverstep 1: Press and hold down the volume key on receiver, the LED indicator on receiver light up; step 2: press the button on transmitter, LED indicator on receiver flashes; step 3: press the button on transmitter again to confirm whether the receiver can sound, If yes, the pairing is completed.
FeaturesBattery: 12V
23A alkaline batteryOperating range: 500+
feet in open areaWaterproofFrequency: 433MHZtarget groupPatients, disable, children, elderly, pregnantNoteIf the range become short please replace the battery of transmitter